CN1003285B - Curling method for edges of metal sheet - Google Patents
Curling method for edges of metal sheet Download PDFInfo
- Publication number
- CN1003285B CN1003285B CN86108581.7A CN86108581A CN1003285B CN 1003285 B CN1003285 B CN 1003285B CN 86108581 A CN86108581 A CN 86108581A CN 1003285 B CN1003285 B CN 1003285B
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- China
- Prior art keywords
- exterior panel
- edge part
- bending
- mentioned
- panel
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- Bending Of Plates, Rods, And Pipes (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
To shape a bend point linearly and to improve the appearance by bending the end part of a sheet metal member in U shape based on the thin thickness part after thinning it partially by bending it at right angles and by pressing the outer face of the bending part as well. The end part 11a of an outer plate 11 is bent at right angles by a press in case of combining the sheet metal member consisting of the inner plate 10 and outer plate 11. Simultaneously the plate thickness thereof is slightly thinned by pressing the vicinity 12 of the bending part of the end part 11a in the plate thickness direction. The both are then combined by pinching the end part 11a of the outer plate 11 so as to wrap it by overlapping it on the inner side of the end part 10a of the inner plate 10 by bending it in U shape by a press after overlapping it with the end part 10a of the inner plate 10 on the inner side of the outer plate 11. Consequently, the strength of a thin part 12 is slightly inferior to those of others, so bending is started from the thin part 12, the bending point 13 becomes always constant and the peripheral edge part of the outer plate 11 is shaped linearly.
Description
The invention relates to the improvement of curling method, it is the U font that this method bends to the cross section with the edge part of a sheet metal, wraps into the edge of another piece metallic plate of cramping in the inside of this bend, and two sheet metals are engaged.
In various sheet metal goods or its parts, need be when it constitutes with the edge part of two sheet metals, promptly the edge part of exterior panel and inside panel interosculates and forms.For example, resemble the parts of automobile door and so on, it is a part that constitutes the car body outward appearance, in order to improve the commodity value of automobile, not only will guarantee the surface accuracy of exterior panel, but also must process its marginal portion beautiful.For this reason, adopted this crimping method for processing that is called as, this method is crooked to the inside with the edge part of exterior panel, and bending to its cross section is the U font, then the edge part with inside panel coats cramping in the inside of this bend, utilizes this method that both are combined.
About the application of curling method, the back door with automobile describes as an example below.Shown in the 6th figure and the 7th figure of accompanying drawing, the back door of automobile (1) is with two sheet metals, is about to inside panel (2) and exterior panel (3) and engages, and makes it in formation space, inside and constitute.And, the joint portion, edge (3a ') of exposing a side of inside panel (2) and exterior panel (3) is processing like this, the edge part (3a) of exterior panel (3) is crooked to the inside, curved to cross section one-tenth U font, then, make the edge part (2a) of inside panel (2) coat cramping in this bend.
This curling method is well-known.For example, as disclosing clear in Japan's utility model and 59-120020 number (on August 13rd, 1984 open) and Japan's utility model disclose clear and disclosed in 60-146523 number (on September 28th, 1985 openly), have several method.These well-known curling methods are generally processed by following order.
Following the 8th figure to the 10 figure with reference to accompanying drawing specify the crimping manufacturing procedure that has earlier.
At first, in the prebuckling operation, only the certain width with the edge part (3a) of exterior panel (3) is bent into approximate right angle.In this prebuckling operation, what for example be illustrated by the broken lines among the 8th figure is such, the outer wall (3) that will be placed on the stationary rivet die (4) with vertical sidewall (4a) is pushed down with die pad (5), the width that makes edge part (3a) stretch out vertical sidewall (4a) keeps certain, subsequently, shown in the solid line of the 8th figure, drift (6) is descended along vertical sidewall (4a), exterior panel (3) is bent into approximate right angle.
In crimping operation subsequently, the edge part (2a) of inside panel (2) is superimposed on exterior panel (3), the line bend of going forward side by side makes the edge part (3a) that bends to the exterior panel (3) of approximate right angle with above-mentioned prebuckling operation overlap on the edge part (2a) of inside panel (2).For this reason, shown in the 9th figure, the above-mentioned edge part (3a) that bends to the exterior panel (3) of approximate right angle in the prebuckling operation is placed on the stationary rivet die (7), its marginal portion is holded up up, the edge part (2a) of inside panel (2) is superimposed on this exterior panel (3), pre-curling punch (8) with inclination punch face (8a) is dropped on the edge part (3a) of above-mentioned vertical shape, earlier this edge part (3a) further is bent to inclination (this operation is called the first crimping operation).
Subsequently, shown in the 10th figure, the exterior panel (3) and the inside panel (2) that process in first operation are placed on another stationary rivet die (9) with stacked state, and the curling punch (10) with almost plane shape punch face (10a) is descended, it is the U font that the edge part (3a) that the above-mentioned usefulness first crimping operation is bent to skewed exterior panel (3) bends to its cross section fully, thereby coats the edge part (2a) (this operation is called the second crimping operation) of cramping inside panel (2).
Therefore, the crimping operation generally comprises the above-mentioned first crimping operation and the second crimping operation.
But, in the processing method that formerly has, the bending point P of the edge part (3a) of exterior panel (3) is fixing, therefore exists in joint edge portion (3a ') and goes up this shortcoming of generation wrinkle.
This phenomenon that wrinkle occurs is mainly caused by following various reasons in the first crimping operation, the laminated body of outer wall (3) and inside panel (2) will be pushed down with die pad 1. that to make it motionless be very difficult; 2. with respect to the inclination punch face (8a) of the pre-curling punch (8) that descends, the compression face (3s) of the edge part of exterior panel (3a) will slide, so when the above-mentioned edge part of bending (3a), be applied to frictional force F on the above-mentioned compression face (3s) and each horizontal component of resistance N changes easily by inclination punch face (8a).The change of this horizontal component then is to go up what of lubricating oil owing to be subjected to compression face (3s), and goes up due to the influences such as the burr that produces and the effect of above-mentioned punch face (8a) when beginning to contact at the limit end (3b) of above-mentioned edge part (3a) when blocking wallboard.
After producing this wrinkle, the overall dimensions of product are irregularity just, and produces small gap between exterior panel (3) and inside panel (2), and in just intrusions such as certain occasion rainwater, this also is the reason of getting rusty.For example, as installing on the car body at the automobile back door that edge part produces this wrinkle, then the edge part at car body and back door can not constitute constant interval, and this becomes ugly with regard to the outward appearance that makes car.
The objective of the invention is, it is to provide improved curling method as its problem, and this improved method can make the edge part (3a) of exterior panel always along answering bent position to carry out bending in the crimping operation afterwards.
The curling method of edges of metal sheet of the present invention carries out as follows.
At first, in the prebuckling operation, with fixed placement at the exterior panel edge part that has on the punch die of vertical sidewall, utilization is along the prebuckling drift of above-mentioned punch die vertical sidewall lifting, become approximate right angle with respect to the outer wall plain bending, carrying out this man-hour that adds, utilization is arranged on the protuberance on this prebuckling drift madial wall, on above-mentioned edge part, form thinner wall section simultaneously along its sweep, then in crimping operation subsequently, this edge part that bends to the exterior panel of approximate right angle is further pressed with curling punch, make it be bent into its cross section and become the U font, thereby the edge part that will be stacked in the inside panel on the above-mentioned exterior panel coats cramping.
If utilize curling method of the present invention, then in the prebuckling operation, bend to when becoming approximate right angle at edge part, just afterwards in the exterior panel upper edge simultaneously and answer bent position to be processed into thinner wall section in the crimping operation with respect to the plane of exterior panel with exterior panel.This thinner wall section is than the thin thickness of the other parts of plate, so become fragile.Therefore in crimping operation subsequently, utilize the curling punch that descends with above-mentioned edge part when further crooked, this bending stress just concentrates on above-mentioned thinner wall section, and therefore along this thinner wall section, the edge part of exterior panel does not produce wrinkle, and like this, bending is come out just good-looking.
The 1st figure is the sectional view of the exterior panel after prebuckling operation processing of the present invention.
The 2nd figure is a sectional view, and expression is connected in the prebuckling operation crimping operation afterwards, and the edge of exterior panel is bent into the edge part that its cross section becomes U font and coats inside panel.
The 3rd figure is the key diagram of prebuckling operation.
The 4th figure is the key diagram of the first crimping operation.
The 5th figure is the key diagram of the second crimping operation.
The 6th figure is the simple stravismus schematic diagram that utilizes the automobile back door of curling method manufacturing.
The 7th figure is the amplification sectional view that the A-A line along the 6th figure is cut.
The 8th figure to the 10 figure are key diagrams that the curling method operation is arranged earlier.
Specify embodiments of the invention with reference to the accompanying drawings.
Method of the present invention is applied to two sheet metals, the occasion that the edge of exterior panel that is about to stack (21) and inside panel (22) utilizes crimping processing to engage together.
In the present invention, utilize the prebuckling drift of punch device, with the edge part (21a) of exterior panel (21) when bending to approximate right angle to the inside, it answers in crimping operation bent position to form thinner wall section (23) shown in the 1st figure afterwards in the lateral surface upper edge of exterior panel simultaneously.
The thickness of this thinner wall section (23) relatively changes with the plate thickness of exterior panel (21).For example, the thickness t of exterior panel (21)
1In the time of between the 0.7-0.8 millimeter, the thickness of thinner wall section (23) cans be compared to the thickness t of plate most
1Thin 0.2 millimeter.In addition, the size of its above-below direction (D) (the 1st figure) preferably is set at the thickness t that approximates exterior panel
1Thickness t with inside panel (22)
2And.When this length was bent into its cross section one-tenth U font at exterior panel (21), its outside portion was elongated.This is to be t because the shape of the exterior panel outside portion that is bent like this becomes level and smooth amount
1+ t
2
In the prebuckling operation, the formation of above-mentioned thinner wall section (23) as shown in Figure 3, be to utilize the about 0.2 millimeter protuberance (27) that stretches out that forms on the top of drift (26) madial wall (26a) to process, this moment, the vertical sidewall (25a) of drift (26) one edge said fixing punch dies (25) descended, will by edge part (21a) that die pad (24) be fixed on exterior panel (21) stationary rivet die (25) on carry out bending on one side.
In the embodiment shown in the figures, first punch edge (28) and second punch edge are fixed on the punch holder (30) in stacked mode, wherein the madial wall (28a) of first punch edge (28) is in such position, make its sidewall of facing said fixing punch die (25) (25a), and vacate relative with sidewall (25a) with the thickness identical distance of exterior panel (21), second punch edge (29) then is in such position, make its madial wall (29a) give prominence to about 0.2 millimeter, so just formed above-mentioned protuberance (27) than the madial wall (28a) of above-mentioned first punch edge (28).This protuberance (27) then is set up like this, makes when drift (26) drops to predetermined minimum point, makes its upper surface that is lower than the exterior panel (21) that is placed on the punch die (25), and distance equals the size up and down (D) of above-mentioned thinner wall section.
In above-mentioned prebuckling operation, edge part (21a) is bent to the exterior panel (21) of approximate right angle in crimping operation subsequently, then shown in the 4th figure, be placed on the precalculated position on the stationary rivet die (31), edge part (22a) with inside panel (22) is stacked on the exterior panel (21) then, is located at the inboard that is bent into the edge part (21a) of the exterior panel of approximate right angle by above-mentioned operation.Subsequently, carry out the first crimping operation, the pre-curling punch (32) with inclination punch face (32a) is descended, at first above-mentioned edge part (21a) further is bent to such as 45 along drift inclined plane (32a).
Subsequently shown in the 5th figure, carry out the second crimping operation, the stack of above-mentioned exterior panel (21) and inside panel (22) is placed on another fixing punch die (33), curling punch with level of approximation shape punch face (34a) is descended, above-mentioned edge part (21a) is bent into its cross section fully becomes the U font, thereby coat the edge part (22a) of inside panel (22).
Utilize this first crimping operation and the second crimping operation, just above-mentioned edge part (21a) can be carried out bending along above-mentioned thinner wall section exactly.The result is shown in the 2nd figure, and the edge part (22a) of inside panel (22) is by be bent into the inside that cross section become the edge part (21a) of U font of cramping at exterior panel (21).
In curling method of the present invention, when in advance the edge part of exterior panel being bent into approximate right angle, because compare with other position, formed relatively more fragile thinner wall section along its predetermined sweep, so when utilizing the crimping punch die to apply bending force for the edge part of exterior panel, stress just concentrates on this thinner wall section.The result is that top edge portion is bent exactly along this thinner wall section.Therefore can overcome in the exterior panel bending operation of prior art because the position of bending point P changes the shortcoming at the edge part generation wrinkle of joint that produces ineptly.
The stamping procedure of other processing thin-walled purposes is not set in the inventive method, because the exterior panel edge part is bent in the prebuckling operation of approximate right angle, to be processed to form thinner wall section simultaneously, and just passable to this as long as change the shape of prebuckling drift slightly, need not expense when therefore repacking the pressing equipment of other purposes into.
Claims (2)
1, a kind of curling method, this method comprises pre-bending operation and crimping operation, in front travel, utilization is along the prebuckling drift (26) of vertical sidewall (25a) lifting of pressing mold (25), and the edge part (21a) that will be placed on the exterior panel (21) on the pressing mold (25) with vertical sidewall (25a) bends to approximate right angle; In the crimping operation, utilize the curling punch will be through the further pressurization of edge part (21a) of the exterior panel that is bent into approximate right angle of above-mentioned pre-bending operation, thereby exterior panel (21) is bent into the cross section becomes the U font, simultaneously, make the edge part (22a) of the inside panel (22) that is placed on this bend inside be coated cramping, the method is characterized in that, in above-mentioned prebuckling operation, when the edge part (21a) of bending forming exterior panel, the protuberance (27) that utilization is provided with on above-mentioned prebuckling drift (26) madial wall, go up along answering bent position in the crimping operation afterwards at exterior panel (21), form thinner wall section (23) simultaneously, in crimping operation subsequently, utilize the relative fragility of above-mentioned thinner wall section (23), exterior panel (21) is carried out further bending.
2, by the described curling method of claim 1, it is characterized in that, stipulate that the size up and down (D) of above-mentioned thinner wall section (23) approximates the thickness of slab (t of exterior panel
1) with the thickness of slab (t of inside panel
2) and.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP297577/85 | 1985-12-25 | ||
| JP29757785A JPS62151227A (en) | 1985-12-25 | 1985-12-25 | Hemming method for end part of sheet metal parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN86108581A CN86108581A (en) | 1987-11-25 |
| CN1003285B true CN1003285B (en) | 1989-02-15 |
Family
ID=17848353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN86108581.7A Expired CN1003285B (en) | 1985-12-25 | 1986-12-25 | Curling method for edges of metal sheet |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS62151227A (en) |
| CN (1) | CN1003285B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513429A (en) * | 2011-12-31 | 2012-06-27 | 长春大正博凯汽车设备有限公司 | Edge covering method of vehicle door frame |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004039882A1 (en) * | 2004-08-17 | 2006-02-23 | Adam Opel Ag | Process for the production of automotive components |
| CN100342989C (en) * | 2004-09-02 | 2007-10-17 | 比亚迪股份有限公司 | Trimming method for non-vertical flanged and intersecting-line flanged product |
| DE102004046432A1 (en) * | 2004-09-24 | 2006-04-13 | Edag Engineering + Design Ag | Formation tool with rollers for producing rolled edge of road vehicle body panel has movable rollers turning back edge of outer panel over inner panel |
| CN101791646A (en) * | 2010-04-15 | 2010-08-04 | 上海交通大学 | Numerical control rolling pressing edge covering method used for automobile body components |
| CN102151735A (en) * | 2010-12-06 | 2011-08-17 | 天津市津兆机电开发有限公司 | Process method for realizing product edge circle rolling in moulds |
| FR2968224B1 (en) * | 2010-12-07 | 2013-08-23 | Valeo Systemes Thermiques | SET OF TWO PIECES SET ONE ON THE OTHER |
| JP5868891B2 (en) * | 2012-05-29 | 2016-02-24 | Ｊｆｅスチール株式会社 | Manufacturing method of different diameter tubular parts |
| CN102814375B (en) * | 2012-07-19 | 2014-11-05 | 东莞市精丽制罐有限公司 | Curling mechanism for metal plate |
| JP6629891B2 (en) * | 2018-01-17 | 2020-01-15 | 株式会社Ｓｕｂａｒｕ | Press forming device and outer panel |
| CN114770964B (en) * | 2021-12-31 | 2023-11-21 | 赛尔富电子有限公司 | Aluminum bottom extrusion fixing device convenient for fixing parts |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5010766A (en) * | 1973-06-06 | 1975-02-04 |
-
1985
- 1985-12-25 JP JP29757785A patent/JPS62151227A/en active Granted
-
1986
- 1986-12-25 CN CN86108581.7A patent/CN1003285B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102513429A (en) * | 2011-12-31 | 2012-06-27 | 长春大正博凯汽车设备有限公司 | Edge covering method of vehicle door frame |
Also Published As
| Publication number | Publication date |
|---|---|
| CN86108581A (en) | 1987-11-25 |
| JPS62151227A (en) | 1987-07-06 |
| JPS6344451B2 (en) | 1988-09-05 |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |